> Why would I buy anything with my bitcoins if a week from now they're going to be work X% more? I'd just wait until then. If you believe this, then surely you

> Why would I buy anything with my bitcoins if a week from now they're going to be work X% more? I'd just wait until then. If you believe this, then surely you also believe you should invest 100% of your money in bitcoins? If not, then you believe only X% of your money should be invested in bitcoins (to avoid the risk of losing everything in a collapse) Therefore if you have >X% of your money in bitcoins, you should spend some.